Wrist- watch



C. F. TROMMER.

WRIST WATCH.

APPLICATION FILED NOV. 21. l9l8.

1 1 m Nn 1 m 5 m M I m F m C Y m B a P WITNESSES ATTORNEYS UNITED STATES PATENT oEEIoE.

CHARLES I. TROMMEZB OF NEW YORK, N. Y., ASSIGNOR TO A. WITTNAUER (10., OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

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Specification of Letters Patent.

Application filed November 27, 1918. Serial No. 284,827.

To all whom it may concern:

Be it known that I, CHARLES F. TROMMER,-

a citizen of the United States, and a resident of the city of New York, Glendale, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Wrist-Watch, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: to facilitate the operation of installing and removing an article of the character mentioned in service; to avoid loss of the article; and to 1 coordinate the elements of the construction for improving the appearance of the article.

Drawings.

Figure 1 is a perspective view of an article of the character mentioned, the view showin the back of a watch case and the opening on s of the bracelet members;

Fig. 2 is a detail view showing in section and on an enlarged scale, the arrangement of the connected ends and clas for holding the same, the section being ta en as on the line 22 in Fig. 1; Fig. 3'is a detail view in perspective showing a modified form of the clasp endsig. 4 is a sectional view thereof the section being taken as on the line 4.4 m Fig. 3.

Description.

- As seen in the drawings, a watch case 9 is 5 furnished with thin lateral extensions 10. The extensions 10 have hinge lmuckles 11, beside which in matched relation are disposed hinge knuckles 12 formed on the clasp sections 13 and 14.. The sections 13 and 14 0 are normally closed upon each other by springs 15, suitably arranged between the 'ointed edges and at the hinge connection.

y reference to Fig. 1 it will be noticed that the back of the Watch case 9, the side extensions 10, and the clasp sections 13 and 14: form an encircling means for the wrist of the user. Several methods may be employed for preventing the sections 13 and 14 pressing too closely u n' the wrist of the wearer.

so Two forms are own in the drawings, the one providin a hinged latch 16', which as best seen in ig. 2 of .the drawings, has a pintle 17 extended from the under s1de there of for engaging any one of a series of sock- 65 ets 18. he latch 16 is permanently attached to one of the clasp sections, a bracket 19 bein extended from the side of said section. 11 the drawings, the bracket 19 is shown as extended from the side of the section 13.

The latch 16 has at the free end thereof, a spring hook 20, which resiliently engages the opposite edge of the section 13 when the pintle 17 rests within one of the sockets 18. It is obvious that when the latch 16 is fastened, the sections 13 and 14 are held in permanent relation. The sockets 18 are suiiiciently close to rovide for all the usual adjustments of the c asps 13 and 1 1 to different sizes of wrists. Where closer adjustment is desired, however, the bin e clasp is replaced by a friction loop 21, which is manently attached to the section 13 to rictionally engage the free end of the section 14. The engagement-of the loop 21 with the end of the section 14 is such as to permit the sections to be drawn apart or compressed manually, the said loop resisting the s rings 15 in their normal effort to close sai clasp sections.

Claims.

1. A wrist watch comprising a watch case having integral thin lateral rigid extensions; a plurality of rigid clasp sections, said sections eing ivotall attached to said lateral extensions, the ice ends of the said clasp sections being arranged in overlapping sliding relation, the back of the watch case, the said extensions and the said clasp sections forming an encircling means for the wrist of the wearer; means for normally contracting said clasp sections; and means for holding said clasp sections in relatively adjusted positions.

2. A wrist watch comprising a watch case having integral thin lateral rigid extensions; a plurality of rigid clasp sections, said sections'being pivotally attached to said lateral extensions, the free ends of the said clas sections being arranged in overlapping sli in relation, the back of the watch case, the said extensions and the said cla'sp sections forming an encircling means for the wrist of the wearer; means for normally contracting said clasp sections; and means for holding said clasp sections in relatively adjusted po- ,sitions, said means embodying a detent member mounted on one of said sections for engaging the opposite section.

3. wrist watch comprising awatch case having integral thin lateral rigid extenr sions; a lurality of rigid clasp sections, said sections eing pivotally attached to said lateral extensions, the back of the watch case, the said extension and the said clasp sections forming an encircling means for the wrist of the wearer; means for normally contracting said clasp sections; and means for holding said clasp sections in relatively adjusted positions, said means embodying a latch hingedly connected with one of said sections and adapted when locked to hold the other of said sections.

4:. A wrist watch com rising a watch case having integral thin lateral rigid extensions; a plurality of rigid clasp sections, said sections being pivotally attached to contracting said clasp sections; and means for holding said clasp sections in relatively adjusted position, said vmeans embodying a .plurality of sockets formed adjacent the end of one of said sections, a latch pivotally mounted on the other of said" sections adjacent the end thereof, said latch having a pintle for engaging said sockets to hold said sections from being contracted upon the v wrist of a wearer.

CHARLES F. TRO t I.

ill' R. 

